HAL800 datasheet(17/24 Pages) MICRONAS

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HAL 800

Micronas

4. Application Notes

4.1. Application Circuit

For EMC protection, it is recommended to add each a

ceramic 4.7 nF capacitor between ground and the sup-

ply voltage respectively the output voltage pin. In addi-

tion, the input of the controller unit should be pulled-

down with a 4.7 kOhm resistor and a ceramic 4.7 nF

capacitor.

Please note that during programming, the sensor will

be supplied repeatedly with the programming voltage

of 12 V for 100 ms. All components connected to the

VDD line at this time must be able to resist this voltage.

Fig. 4–1: Recommended application circuit

4.2. Temperature Compensation

The relation between the temperature coefficient of the

magnet and the corresponding TC and TCSQ codes

for a linear compensation is given in the following

table. In addition to the linear change of the magnetic

field with temperature, the curvature can be adjusted,

too. For that purpose, TC and TCSQ have to be

changed to combinations that are not given in the

table. Please contact Micronas for more detailed infor-

mation.

Temperature

Coefficient of

Magnet (ppm/K)

TCSQ

700

600

500

400

300

200

100

OUT

VDD

GND

4.7 nF

HAL800

4.7 k

Ω

µC

4.7 nF

011

−100

−200

−300

−400

−500

−600

−113

−700

−313

−800

−514

−900

−614

−1000

−815

−1100

−915

−1200

−11

−1300

−13

−1400

−14

−1500

−15

−1600

−17

−1700

−18

−1800

−19

−1900

−20

−2000

−22

−2100

−23

−2200

−24

−2300

−25

−2400

−26

−2500

−27

−2600

−28

−2700

−29

−2800

−30

−2900

−31

Temperature

Coefficient of

Magnet (ppm/K)

TCSQ

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